The crl bm series of back-to-back towel bars with metal washers are constructed of 1.5 Mil thick heavy brass tubing. Decorative metal back-up washers are included as well as plastic washers to protect against glass-to-metal contact. Consists of one bar for each side of the door in four standard sizes. Custom sizes are available. Specifications: material: 3 4 19 mm diameter brass tubing 1.5 Mil thick 1-1 4 32 mm diameter metal washers glass thickness range: 1 4 to 1 2 6 to 12 mm hole diameter required: 1 2 12 mm thread size: 1 4 -20 center-to-center hole spacing: 12 towel bar 12 305 mm 18 towel bar 18 457 mm 24 towel bar 24 610 mm 30 towel bar 30 762 mm available sizes: cat. No. Bm12x12 12 towel bar cat. No. Bm18x18 18 towel bar cat. No. Bm24x24 24 towel bar cat. No. Bm30x30 30 towel bar most shipping weights are approximate and have not been verified. If the exact weight is needed in order to determine shipping costs and shipping costs are required in order for you to complete your order please request this prior to submitting your order by contacting crl customer service. Product images shown are of the actual product or a close representation. Colors can vary depending on your computer s video card and on how your monitor s color is adjusted. Brand: CR Laurence Size: []